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    Our Team

    GMB has a comprehensive team of over 100 professional staff members dedicated to producing exceptional solutions for our clients. From the newest members of our team to our seasoned owners with decades of experience, our people-centered culture is evident in everything we do. Our focus is on imparting wisdom and knowledge to the next generation of design professionals while enriching our communities through innovative design. 

    Charles M. O_Donnell, III, P.E. crop
    Charles M. O’Donnell, III, P.E.

    President, Managing Member, Senior Project Director
    Team Member since 1989

    Stephen L. Marsh, P.E.
    Stephen L. Marsh, P.E., LEED AP, CPSWQ

    Senior Vice President, Senior Project Director, East Region Director of Operations
    Team Member since 1994

    Jason M. Lytle, P.E. crop
    Jason M. Lytle, P.E.

    Senior Vice President, Senior Project Director, West Region Director of Operations
    Team Member since 1998

    A. Reggie Mariner, Jr., P.E. crop
    A. Reggie Mariner, Jr., P.E.

    Senior Vice President, Senior Project Director, Structural / Marine Group Leader
    Team Member since 1992

    James C. Hoageson, P.E. crop
    James C. Hoageson, P.E.

    Senior Vice President, Senior Project Director, East Region Civil / Municipal Group Leader
    Team Member since 1994

    David A. Vanderbeek, P.E. crop
    David A. Vanderbeek, P.E.

    Senior Vice President, Project Director, West Region Civil / Municipal Group Leader
    Team Member since 2004

    Roland E. Holland, P.E. crop
    Roland E. Holland, P.E.

    Senior Vice President, Senior Project Director - Structural / Marine Group
    Team Member since 2001

    Morgan H. Helfrich, AIA sit crop
    Morgan H. Helfrich, AIA, LEED AP

    Senior Vice President, Project Director, Architecture Group Leader
    Team Member since 2006

    Chris B. Derbyshire, P.E. crop
    Christopher B. Derbyshire, P.E.

    Senior Vice President, Project Director, East Region Water / Wastewater Group Leader
    Team Member since 2002

    Katherine J. McAllister, P.E. crop
    Katherine J. McAllister, P.E.

    Senior Vice President, Project Director - East Region Water / Wastewater Group
    Team Member since 2005

    Andrew J. Lyons, P.E. crop
    Andrew J. Lyons, Jr., P.E.

    Senior Vice President, Project Director - East Region Civil / Municipal Group
    Team Member since 2003

    W. Mark Gardocky, P.E. crop
    W. Mark Gardocky, P.E.

    Vice President, Senior Project Manager - West Region Civil / Municipal Group
    Team Member since 1994

    Christopher J. Pfeifer, P.E. cropped
    Christopher J. Pfeifer, P.E.

    Vice President, Senior Project Manager, Site / Sustainable Group Leader
    Team Member since 2013

    Benjamin K. Hearn, P.E.
    Benjamin K. Hearn, P.E.

    Vice President, Senior Project Manager - East Region Civil / Municipal Group
    Team Member since 2014

    James H. Willey, Jr., P.E. crop (1)
    James H. Willey, Jr., P.E.

    Senior Project Director, Retired Managing Member
    Team Member since 1996

    Peter A. Bozick, Jr., P.E.
    Peter A. Bozick, Jr., P.E.

    Senior Project Director, Retired Executive Vice President
    Team Member since 1974

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    John E. Burnsworth, P.E.

    Senior Vice President, Associate, Project Director, West Region Water / Wastewater Group Leader
    Team Member since 1991

    Vincent A. Luciani, P.E. crop
    Vincent A. Luciani, P.E.

    Associate, Senior Project Manager - East Region Civil / Municipal Group
    Team Member since 2006

    Autumn J. Willis crop
    Autumn J. Burns

    Associate / Controller
    Team Member since 2006

    Brent R. Jett, P.E. crop2
    Brent R. Jett, P.E., CFM, CC-P

    Associate, Project Manager, Coastal Resiliency Group Leader
    Team Member since 2019

    Bradley Hogan, P.E.
    Bradley J. Hogan, P.E.

    Associate, Project Manager - West Region Water/Wastewater Group
    Team Member since 2018

    Dean B. Culver crop
    Dean B. Culver

    Construction Services Group Leader
    Team Member since 2014

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    W. Brice Foxwell, P.E.

    In Memory
    Team Member from 1988 - 2022

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